📊 Try Demo • 🔬 Technical Docs • 🎯 Platform Targets • 🚀 Getting Started
Lufalyze is a professional web-based audio analysis platform that implements ITU-R BS.1770-4 and EBU R 128 standards for precise loudness measurement. Analyze audio directly in your browser with WebAssembly performance and complete privacy.
- 🎯 Professional Loudness Analysis - ITU-R BS.1770-4 / EBU R 128 compliance with ±0.1 LU accuracy
- 🔍 Technical Quality Assessment - True peak detection, clipping analysis, DC offset detection, and spectral analysis
- 📊 PDF Reports - Professional analysis reports with platform target comparisons
- 🎚️ Platform Targets - Pre-configured targets for Spotify, YouTube, Apple Music, Netflix, and more
- 🔒 Privacy-Focused - All processing happens locally in your browser
- ⚡ High Performance - WebAssembly-powered analysis with 50x real-time speed
- ⌨️ Keyboard Shortcuts - Full keyboard navigation (press H for help)
- ♿ Accessibility - Screen reader support and ARIA compliance
- 🌙 Dark Mode - Comfortable viewing in any lighting condition
- Visit lufalyze.com
- Upload your audio file (WAV, MP3, FLAC, AAC, OGG, M4A)
- View instant analysis results
- Export professional PDF reports (press E)
# Clone and install
git clone https://github.com/tillrd/Lufalyze.git
cd Lufalyze
npm install
# Start development server
npm run dev
# Build for production
npm run build| Platform | Target (LUFS) | Tolerance |
|---|---|---|
| Spotify | -14.0 | ±1.0 |
| YouTube | -14.0 | ±1.0 |
| Apple Music | -16.0 | ±1.0 |
| Netflix | -27.0 | ±1.0 |
| Amazon Music | -24.0 | ±1.0 |
| TikTok/Instagram | -14.0 | ±1.0 |
| Broadcast TV | -23.0 | ±1.0 |
| Format | Max Size |
|---|---|
| WAV | 100MB |
| FLAC | 200MB |
| MP3 | 75MB |
| M4A/AAC | 75MB |
| OGG Vorbis | 75MB |
| WebM Audio | 75MB |
Lufalyze provides comprehensive audio analysis focused on loudness measurement and technical quality assessment:
- ITU-R BS.1770-4 Compliance - Professional-grade loudness measurement
- EBU R 128 Standards - Broadcast-quality analysis with ±0.1 LU accuracy
- Multi-Metric Analysis - Momentary, Short-term, and Integrated LUFS
- Platform Optimization - Automatic compliance checking for streaming services
- True Peak Detection - Comprehensive peak analysis with platform compliance
- Quality Metrics - Clipping detection, DC offset analysis, and noise assessment
- Spectral Analysis - Frequency balance across 7 bands with professional insights
- Stereo Analysis - Phase correlation, stereo width, and imaging quality
- Accuracy: Professional-grade measurement with ±0.1 LU precision
- Processing Speed: Real-time analysis with WebAssembly optimization
- Coverage: Works with all supported audio formats
- Reliability: Consistent results across different audio content types
| Document | Audience | Content |
|---|---|---|
| README.md | Everyone | Overview, quick start, basic usage |
| docs/TECHNICAL.md | Developers & Researchers | Mathematical formulas, algorithms, implementation details |
| docs/DEVELOPMENT.md | Contributors | Development setup, architecture, testing, deployment |
| CONTRIBUTING.md | Contributors | Pull request workflow, coding standards, community guidelines |
| LICENSE | Legal | MIT license terms |
| Key | Action | Context |
|---|---|---|
| U | Upload file | Always |
| E | Export PDF report | After analysis |
| C | Copy results | After analysis |
| D | Toggle dark mode | Always |
| H | Show help | Always |
| S | Jump to spectrum | Always |
| L | Jump to loudness | Always |
| P | Jump to platform targets | Always |
| F | Jump to file details | Always |
| T | Jump to technical analysis | Always |
| 1-5 | Select platform target | Always |
| Esc | Close modals | In modals |
- Frontend: React 18 + TypeScript + Vite
- Audio Processing: WebAssembly (Rust) + Web Audio API
- Styling: Tailwind CSS + Headless UI
- PDF Generation: PDF-lib for professional reports
- Testing: Vitest + Playwright E2E
- Deployment: Netlify with automatic builds
- Standards: ITU-R BS.1770-4, EBU R 128, WCAG 2.1 AA
We welcome contributions! Please see our Contributing Guide for:
- 🛠️ Development setup and build instructions
- 📝 Coding standards and style guidelines
- 🧪 Testing requirements and procedures
- 📋 Pull request process and review criteria
- 🐛 Bug reporting and feature requests
- License: MIT License - Free for commercial and personal use
- Standards: Implements ITU-R BS.1770-4 and EBU R 128 specifications
- Creator: Richard Tillard (@tillrd)
- Privacy: No data collection, no analytics, no tracking
- Security: All processing local, no server uploads
- 🌐 Live Application: lufalyze.com
- 📁 GitHub Repository: github.com/tillrd/Lufalyze
- 📚 Technical Documentation: docs/TECHNICAL.md
- 🔗 EBU R 128 Standard: tech.ebu.ch/docs/r/r128.pdf
- 🔗 ITU-R BS.1770-4: itu.int/rec/R-REC-BS.1770
- 💖 Sponsor Development: github.com/sponsors/tillrd
Lufalyze - Professional Audio Analysis Platform
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